Re: [edk2-devel] [PATCH v2 0/3] RISC-V: Support Svpbmt extension

["Tuan Phan" <tphan@ventanamicro.com>]

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On Tue, Feb 27, 2024 at 8:42 PM Sunil V L <sunilvl@ventanamicro.com> wrote:

> Hi Tuan,
>
> On Mon, Feb 26, 2024 at 08:34:22PM -0800, Tuan Phan wrote:
> > Hi Sunil/ Andrei,
> > Any comments on this series?
> >
> Did I miss your response to Laszlo's feedback on PATCH 2 - [1]? Apart
> from that, don't we need to handle EFI_MEMORY_WT similar to
> EFI_MEMORY_WC?
>
> Somehow I missed that feedback. Thanks.
About EFI_MEMORY_WT, ARM treats it as EFI_MEMORY_WC under hood but I don't
see RISC-V specs mentions it explicitly so don't feel confident to add
that.

> [1] - https://edk2.groups.io/g/devel/message/115243
>
> Thanks,
> Sunil
> > Regards,
> >
> > On Wed, Feb 14, 2024 at 10:16 PM Tuan Phan via groups.io <tphan=
> > ventanamicro.com@groups.io> wrote:
> >
> > >
> > >
> > > On Wed, Feb 14, 2024 at 9:43 PM Warkentin, Andrei <
> > > andrei.warkentin@intel.com> wrote:
> > >
> > >> Do you mind sharing a GH branch with the patch set?
> > >>
> > > https://github.com/pttuan/edk2/tree/tphan/riscv_mmu_svpbmt
> > > Tuan
> > >
> > >>
> > >> A
> > >>
> > >> > -----Original Message-----
> > >> > From: Tuan Phan <tphan@ventanamicro.com>
> > >> > Sent: Tuesday, February 6, 2024 7:29 PM
> > >> > To: devel@edk2.groups.io
> > >> > Cc: Kinney, Michael D <michael.d.kinney@intel.com>;
> > >> > gaoliming@byosoft.com.cn; Liu, Zhiguang <zhiguang.liu@intel.com>;
> > >> > kraxel@redhat.com; lersek@redhat.com; Kumar, Rahul R
> > >> > <rahul.r.kumar@intel.com>; Ni, Ray <ray.ni@intel.com>;
> > >> > sunilvl@ventanamicro.com; Yao, Jiewen <jiewen.yao@intel.com>;
> > >> Warkentin,
> > >> > Andrei <andrei.warkentin@intel.com>; ardb+tianocore@kernel.org;
> Tuan
> > >> Phan
> > >> > <tphan@ventanamicro.com>
> > >> > Subject: [PATCH v2 0/3] RISC-V: Support Svpbmt extension
> > >> >
> > >> > This patchset adds support for RISC-V Svpbmt extension.
> > >> >
> > >> > The GCD EFI_MEMORY_UC and EFI_MEMORY_WC attributes will be mapped to
> > >> > IO and NC mode defined in PBMT field.
> > >> >
> > >> > v2:
> > >> >   - Generated patch for each package.
> > >> >
> > >> > Tuan Phan (3):
> > >> >   MdePkg.dec: RISC-V: Define override bit for Svpbmt extension
> > >> >   UefiCpuPkg: RISC-V: MMU: Support Svpbmt extension
> > >> >   OvmfPkg/RiscVVirt: Override Svpbmt extension
> > >> >
> > >> >  MdePkg/MdePkg.dec                             |  2 ++
> > >> >  OvmfPkg/RiscVVirt/RiscVVirt.dsc.inc           |  2 +-
> > >> >  .../Library/BaseRiscVMmuLib/BaseRiscVMmuLib.c | 25
> ++++++++++++++++++-
> > >> >  .../BaseRiscVMmuLib/BaseRiscVMmuLib.inf       |  1 +
> > >> >  4 files changed, 28 insertions(+), 2 deletions(-)
> > >> >
> > >> > --
> > >> > 2.25.1
> > >>
> > >> 
> > >
> > >
>


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